CHARACTERIZATION OF MANGANESE DOPED SODIUM BORATE GLASSES USING SPECTROSCOPIC METHODS

Glass samples belonging to the general chemical formula 60B2O3–(40-x)Na2O–xMnO2 with x=5, 10,15, 20, and 25 mol % are prepared by melt quench method. Characterization of the system was carried out using XRD, SEM and FTIR. The structural changes with composition of the glasses have been studied by FT-IR spectroscopy. FT-IR spectra analysis indicates that MnO2 is preferentially incorporated into the borate network. Amorphous nature of the system was confirmed by XRD and SEM is used to study the morphology of the glass samples

Computation of excess values of some acoustical parameters of binary/ternary liquid systems using C-program

346-349<span style="font-size: 15.5pt;mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">Excess values of acoustical parameters obtained from experimental measurements and theoretical calculation in binary/ternary liquid mixtures provide valuable information about the nature and strength or molecular interactions in the system. A brief explanation on the computation of the excess values of acoustical parameters using C-program <span style="font-size:13.0pt;mso-bidi-font-size: 6.0pt;font-family:HiddenHorzOCR;mso-hansi-font-family:" times="" new="" roman";="" mso-bidi-font-family:hiddenhorzocr"="">is <span style="font-size:15.5pt; mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">presented. </span

Ultrasonic studies on aqueous ternary electrolytes

934-936The density, viscosity and ultrasonic velocity have been measured in two ternary electrolytic mixtures of sodium chloride and manganese chloride in the aqueous mixture of magnesium sulphate and cadmium chloride at 308, 313 and 318 K. From these values the parameters like free volume, internal pressure, solvation number and viscosity B-coefficient have been calculated. The results are interpreted on the basis of ion-ion, ion-solvent and structure making/promoting tendency of the electrolytes